package com.example.jin.myplayer.myApplication;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.support.v4.app.NotificationCompat;
import android.telecom.TelecomManager;
import android.telephony.PhoneStateListener;
import android.view.View;
import android.widget.RemoteViews;
import android.widget.Toast;

import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

import com.example.jin.myplayer.R;
import com.example.jin.myplayer.data.MusicList;

/**
 * Created by JIN on 2017/10/13.
 */

public class MusicService extends Service {
    //播放控制命令
    public static final int COMMAND_UNKNOWN = -1;
    public static final int COMMAND_PLAY = 0;
    public static final int COMMAND_PAUSE = 1;
    public static final int COMMAND_STOP = 2;
    public static final int COMMAND_RESUME = 3;
    public static final int COMMAND_PREVIOUS = 4;
    public static final int COMMAND_NEXT = 5;
    public static final int COMMAND_CHECK_IS_PLAYING = 6;
    public static final int COMMAND_SEEK_TO = 7;

    //播放状态
    public static final int STATUS_PLAYING = 0;
    public static final int STATUS_PAUSED = 1;
    public static final int STATUS_STOPED = 2;
    public static final int STATUS_COMPLETED = 3;

    //广播标志
    public static final String BROADCAST_MUSICSERVICE_CONTROL = "MusicService.ACTION_CONTROL";
    public static final String BROADCAST_MUSICSERVICE_UDDATE_STATUS = "MusicService.ACTION_UPDATE";

    //歌曲序号，状态
    private int number = 0;
    private int status;

    //媒体播放类
    private MediaPlayer player = new MediaPlayer();

    //广播接收器
    private CommandReceiver receiver;
    //来电标记
    private boolean phone = false;

    private NotificationManager manager;

    @Override
    public void onCreate() {
        super.onCreate();
        bindCommandReceiver();
        status = STATUS_STOPED;
        //监听来电
        TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        telephonyManager.listen(new MyPhoneListener(), PhoneStateListener.LISTEN_CALL_STATE);

    }

    @Override
    public void onDestroy() {
        sendBroadcastOnStatusChang(MusicService.STATUS_STOPED);
        if (player != null) {
            player.release();
        }
        super.onDestroy();
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    /**内部类，接受广播命令*/
    class CommandReceiver extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {
            String ctrl_code = intent.getAction();
            if (BROADCAST_MUSICSERVICE_CONTROL.equals(ctrl_code)){
                //获取命令
                int command = intent.getIntExtra("command", COMMAND_UNKNOWN);
                //执行命令
                switch (command){
                    case COMMAND_SEEK_TO :
                        seekTo(intent.getIntExtra("time", 0));
                        break;
                    case COMMAND_PLAY :
                        number = intent.getIntExtra("number", 0);
                        play(number);
                        break;
                    case COMMAND_PAUSE :
                        pause();
                        break;
                    case COMMAND_STOP :
                        stop();
                        break;
                    case COMMAND_RESUME :
                        resume();
                        break;
                    case COMMAND_PREVIOUS :
                        moveNumberToPrevious();
                        break;
                    case COMMAND_NEXT :
                        moveNumberToNext();
                        break;
                    case COMMAND_CHECK_IS_PLAYING :
                        if(player != null && player.isPlaying()){
                            sendBroadcastOnStatusChang(STATUS_PLAYING);
                        }
                        break;
                    case COMMAND_UNKNOWN :
                    default:
                        break;
                }
            }else if ("RESUME".equals(ctrl_code)){
                resume();
            }else if ("PAUSE".equals(ctrl_code)){
                pause();
            }else if ("PREVIOUS".equals(ctrl_code)){
                moveNumberToPrevious();
            }else if ("NEXT".equals(ctrl_code)){
                moveNumberToNext();
            }else if ("CLOSE".equals(ctrl_code)){
                manager.cancel(0x3131);
                System.exit(0);
            }
        }
    }

    /**绑定广播接收器*/
    private void bindCommandReceiver(){
        receiver = new CommandReceiver();
        IntentFilter filter = new IntentFilter();
        filter.addAction(BROADCAST_MUSICSERVICE_CONTROL);
        filter.addAction("RESUME");
        filter.addAction("PAUSE");
        filter.addAction("PREVIOUS");
        filter.addAction("NEXT");
        filter.addAction("CLOSE");
        filter.addAction("SLEEPTIME");
        registerReceiver(receiver, filter);
    }

    /**发送广播,提醒Activity更新UI*/
    private void sendBroadcastOnStatusChang(int status){
        Intent intent = new Intent(BROADCAST_MUSICSERVICE_UDDATE_STATUS);
        intent.putExtra("status", status);
        if(status != STATUS_STOPED){
            intent.putExtra("time", player.getCurrentPosition());
            intent.putExtra("duration", player.getDuration());
            intent.putExtra("number", number);
            intent.putExtra("musicName", MusicList.getMusicList().get(number).getMusicName());
            intent.putExtra("musicArtist", MusicList.getMusicList().get(number).getMusicArtist());
        }
        sendBroadcast(intent);
    }

    /** 读取音乐文件*/
    private void load(int number) {
        try {
            player.reset();
            player.setDataSource(MusicList.getMusicList().get(number).getMusicPath());
            player.prepare();
        } catch (Exception e) {
            e.printStackTrace();
        }
        //注册监听器
        player.setOnCompletionListener(completionListener);
    }

    //播放结束监听器
    MediaPlayer.OnCompletionListener completionListener = new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer player) {
            if (player.isLooping()) {
                replay();
            } else {
                sendBroadcastOnStatusChang(MusicService.STATUS_COMPLETED);
            }
        }
    };

    /** 选择下一首*/
    private void moveNumberToNext() {
        // 判断是否到达列表底端
        if ((number ) == MusicList.getMusicList().size()-1) {
            Toast.makeText(MusicService.this,"已达到列表底端",Toast.LENGTH_SHORT).show();
        } else {
            ++number;
            play(number);
        }
    }

    /** 选择上一首*/
    private void moveNumberToPrevious() {
        // 判断是否到达列表顶端
        if (number == 0) {
            Toast.makeText(MusicService.this,"已达到列表顶端",Toast.LENGTH_SHORT).show();
        } else {
            --number;
            play(number);
        }
    }
    /** 播放音乐*/
    private void play(int number) {
        // ֹֹͣͣ停止当前播放
        if (player != null && player.isPlaying()) {
            player.stop();
        }
        load(number);
        player.start();
        status = MusicService.STATUS_PLAYING;
        sendBroadcastOnStatusChang(MusicService.STATUS_PLAYING);
        updateNotification();
    }
    /** 暂停音乐*/
    private void pause() {
        if (player.isPlaying()) {
            player.pause();
            status = MusicService.STATUS_PAUSED;
            sendBroadcastOnStatusChang(MusicService.STATUS_PAUSED);
            updateNotification();
        }
    }

    /** 停止播放*/
    private void stop() {
        if (status != MusicService.STATUS_STOPED) {
            player.stop();
            status = MusicService.STATUS_STOPED;
            sendBroadcastOnStatusChang(MusicService.STATUS_STOPED);
            updateNotification();
        }
    }

    /** 恢复播放（暂停之后）*/
    private void resume() {
        player.start();
        status = MusicService.STATUS_PLAYING;
        sendBroadcastOnStatusChang(MusicService.STATUS_PLAYING);
        updateNotification();
    }

    /** 重新播放（播放完成之后）*/
    private void replay() {
        player.start();
        status = MusicService.STATUS_PLAYING;
        sendBroadcastOnStatusChang(MusicService.STATUS_PLAYING);
        updateNotification();
    }

    /**跳转*/
    private void seekTo(int time){
        player.seekTo(time);
        status = MusicService.STATUS_PLAYING;
        sendBroadcastOnStatusChang(MusicService.STATUS_PLAYING);
        updateNotification();
    }

    /**来电处理*/
    private final class MyPhoneListener extends PhoneStateListener{
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            switch (state){
                case TelephonyManager.CALL_STATE_RINGING:
                    if(status == MusicService.STATUS_PLAYING ){
                        pause();
                        phone = true;
                    }
                    break;
                case TelephonyManager.CALL_STATE_IDLE:
                    if(phone == true){
                        resume();
                        phone = false;
                    }
                    break;
                default:
                    break;
            }
        }
    }

    //通知栏显示
    public void updateNotification() {
        manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        //获取自定义布局
        RemoteViews views = new RemoteViews(getPackageName(), R.layout.statusbar);
        views.setImageViewResource(R.id.icon, R.drawable.ic_allapps_pressed);
        views.setTextViewText(R.id.musicName, MusicList.getMusicList().get(number).getMusicName());
        views.setTextViewText(R.id.artist, MusicList.getMusicList().get(number).getMusicArtist());

        if (status == MusicService.STATUS_PLAYING){
            views.setViewVisibility(R.id.play_play, View.GONE);
            views.setViewVisibility(R.id.play_pause, View.VISIBLE);
        } else {
            views.setViewVisibility(R.id.play_play, View.VISIBLE);
            views.setViewVisibility(R.id.play_pause, View.GONE);
        }
        // 按钮监听事件
        views.setOnClickPendingIntent(R.id.play_previous, pre_PendingIntent());
        views.setOnClickPendingIntent(R.id.play_play, play_PendingIntent());
        views.setOnClickPendingIntent(R.id.play_pause, pause_PendingIntent());
        views.setOnClickPendingIntent(R.id.play_next, next_PendingIntent());
        views.setOnClickPendingIntent(R.id.close, close_PendingIntent());
        //点击通知，进入界面
        Intent intent = new Intent(this,MyPlayer.class);
        PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
        //发送通知
        builder.setContent(views)
                .setContentIntent(pi)
                .setPriority(Notification.PRIORITY_MAX)
                .setOngoing(true)
                .setSmallIcon(R.drawable.ap_icon_on);

        Notification notification = builder.build();
        notification.flags = Notification.FLAG_ONGOING_EVENT;
        manager.notify(0x3131,notification);
    }

    private PendingIntent close_PendingIntent() {
        Intent intent = new Intent("CLOSE");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        return pendingIntent;
    }

    private PendingIntent next_PendingIntent() {
        Intent intent = new Intent("NEXT");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        return pendingIntent;
    }

    private PendingIntent pause_PendingIntent() {
        Intent intent = new Intent("PAUSE");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        return pendingIntent;
    }

    private PendingIntent play_PendingIntent() {
        Intent intent = new Intent("RESUME");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        return pendingIntent;
    }

    private PendingIntent pre_PendingIntent() {
        Intent intent = new Intent("PREVIOUS");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        return pendingIntent;
    }
}
